Drop-dispersing agent



Patented Oct- 6, 1925.

UNITED STATES OTTO HEIDEMANN AND m JOHN, O1 IBOOEU'M, GERMANY.

DBOP-DISPEBSING. AGENT.

No Drawing.

To all whom it may concern: Be it known that we, Or'ro Hnmnmmz, residing at 21, Kronenstrasse, Bochum, Germany, and MAX JOHN, residing at 19, 5 Kronenstrasse, Bochum, Germany, have invented certain new and useful Improvements in Drop-Dispersing Agents, of which the following is a specification.

This invention relates in general to means 1 for preventing the formation of drops on surfaces and more particularly to means for preventing rain from adhering to the panes ofvehicles and the like in the form of drops. The formation of drops on surfaces is due to the mutual cohesion of the particles of the water being greater than their adhesion to the pane. Therefore the fundamental idea underlying the invention is to increase the adhesion of the water tothe. pane to such an extent that when it strikes against the pane its particles are torn apart and caused to spread and flow down in the form of a uniform layer that does not considerably affect the transparency 26 of the Wet pane.

This object is accomplished by means of a basic or fundamental substance (such as clay) capable of being converted into thin slime or mud and mixed with soda. This 80 mixture is applied to the pane b rubbing it on and the first shower to w ich it is subjected will wash a art of thecoating away, but will leave the pane in such a condition that drops of rain striking against itwill immediatel spread out into a fine film and flow oil This condit' n lasts several hours so that it will nsua ly exceed the duration of the rain. e

In order to increase the trans arency of 4 the pane, which is impaired att by the mixture spread over it (especiall with artificial light) a black color is aided to the Ap l cation filed An -t 18,1921. Serial no. 488,498.

mixture. The thin blackish layer impairs the transparency much less than a lightcolored layer, which has the effect of a curtain.

Clay has been found to be a suitable fundamental or basic substance, but any other materialwould be satisfactory that behaves like clay as far as the possibility of converting it into a slime or mud is concerned.

It has been found that a good mixture is one in which the proportion of soda to the aggregate quantity of the other parts is ten per cent. The said other parts consist of the basic substance and enough water to produce a material of asufliciently soft consistency. 1

To maintain the'doughy consistency of a f the drop-dispersing agent some glycerine may be added to it.

,We' claim:

1. lhe process of preventing the forma tion of ram drops on a glass surface'conl5 sisting of applying to such surface a drop dispersing agent comprising a mixture of a liquid, 8. basic substance capable of'being converted into aslime, and soda.

'2 The rocess. of preventing tion of ram drops on a glass surface, consisti g in applying to such surfacea drop disp rsing agent comprising a mixture of clay, water, and soda.

3. Thepa'ocess of preventing the'forma- 7 tion of rain drops on a glass surface, consisting in applying to such surface a drop dispersing agent comprising a mixture of clay, water, and about 10% of soda.

In witness whereof we have hereunto set our hands. 1

OTTO HEIDEMANN} MAX JOHN.

the formalo n 

